\(\dfrac{x-3}{3}=\dfrac{27}{x-3}\)
\(\Rightarrow\left(x-3\right)\left(x-3\right)=27.3\)
\(\left(x-3\right)^2=81\)
\(\left(x-3\right)^2=9^2=\left(-9\right)^2\)
TH1: x -3 =9
x=12
TH2:x-3=-9
x=-6
=.= hok tốt!!
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\(\dfrac{x-3}{3}=\dfrac{27}{x-3}\)
\(\Rightarrow\left(x-3\right)\left(x-3\right)=27.3\)
\(\Rightarrow\left(x-3\right)^2=81\)
\(\Rightarrow\left(x-3\right)^2=9^2\Rightarrow x-3=9\)
\(\Rightarrow x=12\)
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